# std::isalpha(std::locale)

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< cpp‎ | locale

Defined in header `<locale>` |  |
template< class CharT > bool isalpha( CharT ch, const locale& loc ); |  |

Checks if the given character is classified as an alphabetic character by the given locale's std::ctype facet.

### Parameters

ch | - | character
loc | - | locale

### Return value

Returns true if the character is classified as alphabetic, false otherwise.

### Possible implementation

    template<class CharT>
    bool isalpha(CharT ch, const std::locale& loc)
    {
        return std::use_facet<std::ctype<CharT>>(loc).is(std::ctype_base::alpha, ch);
    }

### Example

Demonstrates the use of `isalpha()` with different locales (OS-specific).

Run this code

    #include <iostream>
    #include <locale>

    int main()
    {
        const wchar_t c = L'\u042f'; // cyrillic capital letter ya

        std::locale loc1("C");
        std::cout << "isalpha('Я', C locale) returned "
                  << std::boolalpha << std::isalpha(c, loc1) << '\n';

        std::locale loc2("en_US.UTF8");
        std::cout << "isalpha('Я', Unicode locale) returned "
                  << std::boolalpha << std::isalpha(c, loc2) << '\n';
    }

Possible output:

    isalpha('Я', C locale) returned false
    isalpha('Я', Unicode locale) returned true

### See also

isalpha | checks if a character is alphabetic (function)
iswalpha | checks if a wide character is alphabetic (function)

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